Mask sizing/fitting tool



FIG. 1 is a front perspective view of a mask sizing/fitting tool according to a first embodiment of our new ornamental design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a front perspective view of a mask sizing/fitting tool according to a second embodiment of our new ornamental design;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a top view thereof;

FIG. 13 is a bottom view thereof;

FIG. 14 is a left side view thereof;

FIG. 15 is a right side view thereof; and,

FIG. 16 is a rear perspective view thereof, in which the slider has been moved to the “medium” size position.

Where included, broken lines represent environmental structure and do not form a part of the claimed design. 

The ornamental design for a mask sizing/fitting tool, as shown and described. 